Thread sewing-machines



W. A. SPRINGER. GUIDES FOR WAX-THREAD SEWING-MACHINES.

Patented Jan.-4,1'876.

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N-PETEfis, PHDTO-LITHOGRAFNER, WASHINGTON. D. C-

UNITED 55 STATES PATEN "OFFICE 1 WILLIAM ASPRINGER, OF MARLBOROUGH, MASSACHUSETTS. 1

I IMPROVEMENT IN culpes Fen WAfX-THREAD SEWING-MACHINES. v

Specification forming part of Letters Patent No. 17:1,877, dated January 4, 1876; application filed November 5, 1875.

To all whom it may concern:

Be it known that I, WILLIAM A. SPRINGER, of Marlborough, in the county of Middlesex, Commonwealth of Massachusetts, have inven ted certain new and useful Improvements in Guides for Sewing-Machines, to be used in sewing loops orshoe-Straps at the same time that; a lap-seam is sewed, in manufacture of boots and shoes, as will be hereafter explained and I do hereby declare that the following is a full, clear,'and exact description of the same, refernce being had to the accompanying drawings, forming a part of this specification, and in Which- 1% Figure 1 represents a top or plan view of my said improved guide; Fig.2 represents a front view of the same as it appears when attached to a sewing-machine post forms, a part of the device being shown elevated in dotted lines to illustrate its construction more fully, as will be hereafter explained. Fig. 3 represents a vertical section through the device on line A B, Fig. 1, looking in the direction of the arrow in said figure. Fig.4 represents a top or plan view of the .device, together with two pieces of leather and webbing which form the strap, in the relative position which they occupy during the process of stitcl1- ing them together by a lap-seam, when my guide is used to form the upper or front part i of the vamp of a gaiter boot or shoe, as will be hereafter'explained. Fig. 5 represents a front view of a section of the upper part of a vamp to a gaiter boot or shoe after the piece of leather and webbing have been stitched to gether by the use of my improved guide, as will be hereafter explained. Fig. 6 represents a back view of a section of the upper part of a gaiter boot or shoe leg after the pieces of leather and webbing to form the strap have also been stitched together to form a lap-seam by'means of my improved guide, and Fig. 7 represents a top or plan view of a portion of my improved guide connected to be used in a reversed position from what the same parts are shown and described in Fig. l, as will be hereafter explained. v

'To enable those skilled in the art .to which my invention belongs to make and use the same, I will proceed to describe it more in deent granted John M. Nichols, No. 168,521,

dated October 5, 1875. v

[The front of plate A is provided with two dovetail grooves, 0 c, for the reception of the lower dovetailed edge 61 of the block 0, through which a set-screw, 0, passes. the inner end of block (3, and a shortdistance above thepart A of plate A, projects a thin lip, f, thereby dividing the inner end of block 0, so as to leave two shoulders, g andh.

By means of set-screw 0 block G can befadjusted back and forthlin slot 0, as occasion may require.

- =From the front edge of'block (l alpin or stud, 1 projects, and upon which stud a,

guide-arm D is hinged, so that it can be raised and lowered.

and outward, as indicated in full and heavy dark lines, Figs. 1 and'7. To form a strong and rigid connection between the inner end ofarm l) and guide E the inner end of the former is reduced, while the latter is made; with a notch, 2, whereby, when said parts are placed together, and screw m inserted, a rigid block joint is produced, as fully indicated in the drawings. From the front edge of the work table or plate A projects 'a'down ward I inclined lip, F, and to said: lip is secured the loop-guide 0, through which the webbing passes, and by which it is retained in its proper relative positioifagainst itsguideshoulder, and which loop'guide 0 is so ar- In this instance it is repre- From (See Fig. 2.) To the inner end f of guide-arm D is secured by a screw, m, a. f

guide-piece E, having a curved guide-pin, n,

upon its upper side, the inner face of the guide-pin n being slightly beveled upward ranged that its center will be on a line. or. nearly se en a line passing. between the two needleand awl slots 1) b.

7 When the parts are arranged, as shown in Figs. 1, 2. and 4, the guide is arrangednfor, sewing a double and right-hand lap-seam, and atthe same timense wingthe strap G tm the pieces of leather t-hat are stitched together.

The operation is as follows: When the parts H H of the leather; are. stitched ,together, to,

form the front part of the upper end of a gaiter boot or shoe leg, and at the same time that 4 the pull strapG is secured of? stitehedtto said partsH H of the-boot or shoe leg, the operator first takes hold of the webbing I, which may be drawn from a roll, and passes it through guide-loop, 0, and then draws. it for: ward under lip f, so that the left-hand edge will bear against and be guidednby shoulder h, and. thence past the, needleasl'ots, b I p and then turnsiit back so as to form, a Ypulhstrap or loop, G, the end extending back so, that whenthestitchiug3 3 commences at the points '2? t both ends of the loop, or strap G will be stitchedtogether and to the bootleg parts i H H;, as thestitching progresses dowuflto the point p, or, to a greater, or ,lessq distancaas maybe ,desired.

It'a greater distance s desiredlja greater,

length of Iwebbing will be required?- for the increased lap of theloop G, while if a lessdistance is required a less length of webbing will be, req uired.

It will be observed that the inner lines ,J J of the,ypieces .HH curve in opposite 'directions, and as it is necessary to bring, edges J J together, so that theiredges, whenlapped and stitched ltogether, by the double row of 1 stitching 3 3,, shallbe parallel to each other, the, inner edge ,J otfithe piece Hisj slipped under guide-piece .E and arm D, and over,

lip f, so that it will bear against shoulder g, while the edge J of the piece H is passed over arm DI and block (J, so that ,its edge will bear againsttheshoulder guide lip or fin in on'the guide piece E, whereby, as the double rows of stitching ii 3 progress,;the leather H H and webbing I will be "stitchedltogether, as indicated in Figs. 4 and ,5 ,i of the drawings, the

edges J J being drawn into parallel lines as theypass. the needlewslotsb bin consequence of the action ,of guide-shoulders g and n, as.

before explained.

Ordinarily,a single thickness of webbing is allowed to be stitched to the; leg down to the ends 5 5 of theparts H E. This depends wholly, however, upon the preference of {the manufacturer. i 7

From theuforegoing description it will be seen that by myimproved guidethe leg. parts H H and webbing-strap G, can be stitched together by a lap-seam and double row of stitching at oneoperation, and with the greatest accuracy and precision, and thus, overcoming the ,many serious objections incident entlwidthsf v l b In Fig. 6 a section, of thetupper parts 11 El ot? the ,b'ackof a gaiter boot orlshoefleg is shown stitched together bytwo rows of,

stitching, 3 3, toform a lap-seamat the same,

i to and consequent upon the old mode ofstitchs ing and uniting the parts together.

In case that it is desired to have the lap left-handed instead of right-handed, as shown inFig. 4,,a left-handed guide-piece (shown in Fig. 7,) is employed, and the dovetail part d of block 0 slipped int the sl yeta ied gr The width of lap for seam may-be varied byhayin g difl'ereptguide-parts, such as shown in Figs. 1 and 7, to slip into the respective roovescc as occasion ma re uire and the laminay be also varied 1 by having difl'erent guide-pieces E, with the shoulder or fin part it set at "different distances from shoulder g and block (3, or difi'erent guide-blocks Gmay be used to vary the distance 1 betweenishoulw nd guide an l; a e-i ide:

arms Dof varying, lengths maybe us ats the arin ,may be made. in ;,twe piec es,j and la-ppedand held together by a, suitable fastening, so that itsyylength can be quicklyland time that jthe webbing I' isstitched lfjto the parts t9 tormthe draw strapor loops; and myimp'royed guide is also particularly adapted for facilitating the manufacture of this 1 pa e of the boot or shoe.

Those skilled in the artto which my tion, belon gs Will observe that the construction of my improved guide issuch thatit will work with equal fltcility when the material varies inthickness, since when the part which runs under the guide-arms ID, and against shoulder g, varies in thickness, arm D,' being hinged, rises and falls to conformthereto.

i The block 0 may be made so that by ehang ing it end for end the guide may be used ,for

sewing. any kind of laprseam, the reverselend being made smooth, and without the projeck tion or lip f.

The same object may be accomplished by makingthe lower partlofthe block 0 detach-l able, so that thelip part can be removedand another substituted Withouta lip.

Having described myimproved guide for, sewing lap-seams, in the manufacture of legs, forboots and. shoes, and stitching webbing draw straps or loops thereto at thesa neltiine, what I claim therein as new, and of my invention, and" desire to secureJby Iietters rat am, is-

1. The combination, with the work r hee a.

dIe-pIateol a sewing 1nachine,of two leather lap guide or shoulders, anda webbing guide.

or shoulder, Wherebya boot 1 orshoe legflap seam can be stitched, and the lwebbingl lo'op or strap secured thereto at the same time,

substantially as described.

2. The combination, with the work table or a plate A, of a lap-seam guide device, consisting of the parts 0, D, and E, substantially as and for the purposes set forth.

3. The combination, with the hinged guidearm D and guide-piece E, of block 0, having lipf, and shoulders g and h, substantially as and for the purposes set forth. 7

4. The combination, with the work or needle-plate of a sewing-machine, of two leather lap guides or shoulders, g and 'n, and a webbing guide or shoulder, h, and webbing loopguide 0, substantially as and for the purposes set forth. 7

WM. A. SPRINGER. 

